59  * New watch events happening in this time can be ignored by firing all watches
81 /* List of pending watch callback events, and a lock to protect it. */
85 /* Protect watch (de)register against save/restore. */
777 /* Register callback to watch this node. */
778 int register_xenbus_watch(struct xenbus_watch *watch)  in register_xenbus_watch()  argument
781 	char token[sizeof(watch) * 2 + 1];  in register_xenbus_watch()
784 	sprintf(token, "%lX", (long)watch);  in register_xenbus_watch()
786 	watch->nr_pending = 0;  in register_xenbus_watch()
792 	list_add(&watch->list, &watches);  in register_xenbus_watch()
795 	err = xs_watch(watch->node, token);  in register_xenbus_watch()
799 		list_del(&watch->list);  in register_xenbus_watch()
809 void unregister_xenbus_watch(struct xenbus_watch *watch)  in unregister_xenbus_watch()  argument
812 	char token[sizeof(watch) * 2 + 1];  in unregister_xenbus_watch()
815 	sprintf(token, "%lX", (long)watch);  in unregister_xenbus_watch()
821 	list_del(&watch->list);  in unregister_xenbus_watch()
824 	err = xs_unwatch(watch->node, token);  in unregister_xenbus_watch()
826 		pr_warn("Failed to release watch %s: %i\n", watch->node, err);  in unregister_xenbus_watch()
835 	/* Cancel pending watch events. */  in unregister_xenbus_watch()
837 	if (watch->nr_pending) {  in unregister_xenbus_watch()
839 			if (event->handle != watch)  in unregister_xenbus_watch()
844 		watch->nr_pending = 0;  in unregister_xenbus_watch()
863 	struct xenbus_watch *watch;  in xs_resume()  local
864 	char token[sizeof(watch) * 2 + 1];  in xs_resume()
873 	list_for_each_entry(watch, &watches, list) {  in xs_resume()
874 		sprintf(token, "%lX", (long)watch);  in xs_resume()
875 		xs_watch(watch->node, token);  in xs_resume()